McIntosh XLS112 owner manual How to Operate How to Operate, Level Control, Low Pass, Phase, Power

Figure 5

Figure 7

Figure 4

Figure 3

How to Operate

How to Operate

Level Control

Start with the LEVEL CONTROL in the center position and perform the system level calibration on the A/V Con- trol Center or Surround Decoder for

the subwoofer level. If the subwoofer level can not be set, adjust the XLS112’s LEVEL CONTROL to provide adequate range during cali- bration. Refer to figure 3.

Note: If the Control is set to maximun and additonal output is needed refer to note 3.2 on page 10.

Low Pass

This control determines from what frequency and below the XLS112 will reproduce sound when the imformation is present in the audio signal.

When the XLS112 is used with a discrete Sub Out from a Home Theater Control Center, the LOW PASS Control should be set to OUT, as the signal should contain only low frequency in- formation. Refer to figure 4.

Phase

The PHASE Switch sets the acoustic output phase of the XLS112 to either 0 or 180 degrees relative to its input. This switch is to help avoid phase cancellation (characterized by a loss of bass information) between the

XLS112 and any other low frequency producing speaker in the system. Care- ful listening with this circuit switched to 0 and then listening with it switched

to 180 will help you determine if this effect will be benefi- cial to the system. Set the switch for the desired bass out- put. Refer to figure 5.

Power

When the POWER SWITCH is set to the OFF position, the XLS112 can not be turned on by a

Remote Power Conrol input or au- dio input signal sensing. Refer to figure 6.

Figure 6

Remote Power Control

The XLS112’s Power Control Circuitry uses the turn-on signal from a McIntosh Control Center or Preamplifier to switch On and Off. When a Power Control Cable is con- nected between the Control Center or Preamplifier and the XLS112, the audio signal-sensing circuit is disabled and the XLS112 will automatically turn-on when the Control Center or Preamplifier is on. The XLS112 also has a Power Control OUTput jack for triggering additional subwoofers or other McIntosh component(s).

When there is no Power Control Cable connected to the XLS112, the audio signal-sensing circuitry is active and automatically switches power On and Off. This occurs when a music signal is detected at the Line INput(s). A time delay of thirty minutes is incorporated in the circuit to prevent the XLS112 from turning off during a music or movie passage where there is little low frequency activity.

Status Indicator

The STATUS Indicator is a tri-color LED and illuminates a dif- ferent color depending upon the current operating condition of the XLS112. When the LED is illuminated Red the XLS112 is in the Standby Mode. The LED will change to Green in color when the XLS112 is switched on ei-

ther by a Power Control Signal or the Audio Signal Sensing Cir- cuit has detected a low fre- quency audio signal present at

the Input jack(s). During peaks in the audio signal the LED may change from Green to Orange in color to indicate the built-in Power Guard Circuit has momentarily activated. Refer to figure 7.

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